在赤道潘盖亚的最早的波斯纪中追踪"过渡"的二分形态生物
Gabriela Calábková1,2, Daniel Madzia3, Vojtěch Nosek4
1Department of Geology and Paleontology, Moravian Museum, Brno, Czech Republic.
PeerJ
|December 11, 2023
概括
这项研究详细介绍了来自波斯河 Boskovice 盆地的两个不同的 Ichniotherium 轨迹类型,揭示了二形形态动物的过渡姿势进化,并扩展了已知的 Ichnological 记录.
科学领域:
- 古生物学的古生物学
- 这种技术是什么?
- 脊椎动物古生物学 脊椎动物古生物学
背景情况:
- 迪亚德克托莫尔法,大体的茎虫或早期的突触虫,是从石灰岩晚期到波斯末期成功的高纤维食草动物.
- 这些动物是从尸体化石和广泛分布的轨迹和轨道所知,这些轨迹和轨道归因于Ichnogenus Ichniotherium.
- 在博斯科维茨盆地,米四足动物的鱼类学记录仍然在很大程度上未被探索.
研究的目的:
- 提供一个详细的描述,一个diadectomorph轨道和一个手-pes夫妇从Boskovice盆地的Asselian (最低的珀姆).
- 为了识别化石标本所代表的 ichnotaxa.
- 分析这些发现对于理解二形形态的姿势演化和该地区的生物多样性的意义.
主要方法:
- 详细的形态描述和化石轨迹和手-人偶标本的类型分析分析.
- 轨道形态和轨道参数的比较与先前描述的Ichniotherium标本和相关种类 (例如,Diadectes,Orobates).
- 石层学分析以确定化石的确切年龄和沉积背景.
主要成果:
- 描述两种不同的 Ichniotherium 的 ichnotaxa: I. cottae 和 I. sphaerodactylum.
- I. cottae的轨道,包括14条轨道,包括6个手脚的对,代表了这个ichnotaxon从阿塞利亚层的最完整的记录.
- I. cottae的轨道在二形姿势进化中表现出过渡性特征,将二形状的轨道形态与奥罗巴特形状的手脚距离相结合.
- I. sphaerodactylum manus-pes对是来自庞盖亚的欧洲部分的第二个记录.
结论:
- 描述的 Ichniotherium 标本对博斯科维茨盆地的珀米亚四足动物的 Ichnological 记录做出了重大贡献.
- I. cottae的轨迹提供了关键的证据,以了解在阿塞利亚时代期间二形形态动物运动和姿势的进化变化.
- 这项研究突显了Boskovice盆地的以前未被充分探索的鱼类技术记录中进一步发现的潜力.
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